thousands of de-stroked 454 were built in the late sixties early seventies, find any older Hot Rod type mags and you can see the hp. ratings.

The square port 427 was conservatively factory rated at 425 hp for starters, then went up from there. I ran a 440 in a street car in 72 that was a consistant 11.70 car, driven to work every day and 135 miles to the strip.

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